http://en.wikipedia.org/wiki/Bacteria
Motile bacteria are attracted or repelled by certain stimuli in behaviors called taxes: these include chemotaxis, phototaxis, energy taxis, and magnetotaxis.In one peculiar group, the myxobacteria, individual bacteria move together to form waves of cells that then differentiate to form fruiting bodies containing spores.The myxobacteria move only when on solid surfaces, unlike E. coli, which is motile in liquid or solid media.
Motile bacteria are attracted or repelled by certain stimuli in behaviors called taxes: these include chemotaxis, phototaxis, energy taxis, and magnetotaxis.In one peculiar group, the myxobacteria, individual bacteria move together to form waves of cells that then differentiate to form fruiting bodies containing spores.The myxobacteria move only when on solid surfaces, unlike E. coli, which is motile in liquid or solid media.
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